Fixes are available
Db2 Version 11.1 Mod2 Fix Pack2 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod2 Fix Pack2 iFix002 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 3 Fix Pack 3 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix002 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod4 Fix Pack4 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 4 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 5 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 7 for Linux, UNIX, and Windows
APAR status
Closed as program error.
Error description
Users might encounter incorrect result or SQL0811N error when the following conditions are met: 1. There is a scalar subquery. 2. There is a NOT EXISTS subquery. 3. There are at least two equality predicates in the form of <col1> = <constant>, and <col2> = <constant> whereas the two predicates has the same constant value but the data types of <col1> and <col2> are different yet compatible (i.e., one data type can be promoted to the other data type.) 4. There is an equality predicate in a scalar subquery in which the equality predicate contains a correlated column from the query block outside of the scalar subquery. In addition, the correlated column must be either <col1> or <col2> in condition 3. An example query is as following: SELECT ... FROM A, B, C WHERE A.CHAR5COL = '10000' /* condition 3 */ AND B.CHAR10COL = '10000' /* condition 3 - A.CHAR5COL and B.CHAR10COL have different but compatible types */ AND C.C1 = (SELECT D.D1 FROM D WHERE D.CHAR10COL = A.CHAR5COL) /* conditions 1 and 4 */ AND NOT EXISTS (SELECT 1 FROM E WHERE E.E2 = A.A2) /* condition 2 */ AND A.A3 = C.C3
Local fix
The work around of this problem is to replace the right hand side of the scalar sub-query predicate with the constant it correlates to. The example query above will look like this with the work around: SELECT ... FROM A, B, C WHERE A.CHAR5COL = '10000' AND B.CHAR10COL = '10000' AND C.C1 = (SELECT D.D1 FROM D WHERE D.CHAR10COL = '10000') /* replace A.CHAR5COL with the constant - '10000' */ AND NOT EXISTS (SELECT 1 FROM E WHERE E.E2 = A.A2) AND A.A3 = C.C3
Problem summary
**************************************************************** * USERS AFFECTED: * * ALL * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 11.1 Mod 2 Fix Pack 2 iFix001 or higher * ****************************************************************
Problem conclusion
First fixed in Db2 11.1 Mod 2 Fix Pack 2 iFix001
Temporary fix
Comments
APAR Information
APAR number
IT20438
Reported component name
DB2 FOR LUW
Reported component ID
DB2FORLUW
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-05-03
Closed date
2017-10-11
Last modified date
2017-10-11
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
DB2 FOR LUW
Fixed component ID
DB2FORLUW
Applicable component levels
RB10 PSN
UP
Document Information
Modified date:
04 May 2022